This cumulative update package provides a collection of performance and reliability improvements to Windows 8. We recommend that you apply this cumulative update as part of your regular maintenance routines.

Improvements

This cumulative update includes the following performance and reliability improvements:

Increased power efficiency to extend battery life

Performance improvements in Windows 8 applications and Start screen

Improved audio and video playback in many scenarios

Improved application and driver compatibility with Windows 8

Known issues

The following known issues may occur after you apply this update:

When you turn a Windows feature on or off, the computer may require a restart. For example, this action may be necessary when you turn Remote Access on or off.

Prerequisites:

To apply this update, you must be running Windows 8 or Windows Server 2012.